Australian Energy Market Operator

AEMO operates Australia's National Electricity Market (NEM), the interconnected power system in Australia’s eastern and south-eastern seaboard, and the Wholesale Electricity Market (WEM) and power system in Western Australia.

AEMO operates gas retail markets in New South Wales and the Australian Capital Territory, Queensland, South Australia, Victoria, and Western Australia. AEMO also operates wholesale gas markets in south-eastern Australia, those being the Declared Wholesale Gas Market in Victoria (DWGM), the Short Term Trading Market in Adelaide, Brisbane and Sydney (STTM), and the Gas Supply Hub (GSH), whose trading locations are based at Wallumbilla in Queensland, and Moomba in South Australia. AEMO also operates the Natural Gas Services Bulletin Board (GBB), and is system operator of the Victorian Gas Declared Transmission System. AEMO is also responsible for Gas Services Information functions in Western Australia.

The Australian Energy Market Operator (AEMO) is working with industry to implement changes arising from an Australian Energy Market Commission (AEMC) Final Determination to implement Five-Minute Settlement (5MS) in the National Electricity Market (NEM), which will commence on 1 July 2021. AEMO has also submitted a rule change to the AEMC to consider the merits of Global Settlement (GS), with comments due on the draft determination by 25 October 2018. Please see this link for further details.

To implement the 5MS (and potentially the GS) rule change AEMO has established the 5MS Program, comprising the following workstreams:

Industry engagement overview

Engagement between AEMO and industry will be crucial to successful execution of the 5MS Program. The following diagram outlines AEMO’s approach to engagement (forums and groups specific to the 5MS Program are highlighted in yellow).

Detailed information on each workstream and the 5MS forums and groups is available by navigating to separate pages (see section on the left).

For Further Information

Please direct any queries regarding the Five-Minute Settlement (5MS) Working Groups to 5ms@aemo.com.au.